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An FDA approved diet pill for obese patients.

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  • Established: 1959 FDA approval; available in the 1970s; removed from the market voluntarily in 1997 but still available
  • Founder: Originally sold by King Pharmaceuticals; currently made by several companies
  • Accessibility: Prescription only
  • Diet Type: Appetite suppressant to be taken short-term
  • Gender: Male and female

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Phentermine is a short-term prescription appetite suppressant that works by stimulating the hypothalamus gland and affecting neurotransmitters in order to decrease your appetite. The hypothalamus gland is the portion of the brain that controls many functions, including your appetite. Combined with proper nutrition and exercise, you can see weight loss results

  • Phentermine is given under doctor supervision
  • Formulated specifically for the obese
  • Documented success stories
  • Suppresses appetite
  • Short term help to lead you to eat healthy and exercise
  • FDA approved
  • Generic version available which is cheaper than name brand

  • Phentermine has the potential of many serious side effects, including: chest pain, fainting, swelling of feet or lower legs, trouble in breathing, among others
  • Currently available by prescription only
  • Not a long term solution
  • Side effects of dry mouth, blurred vision, constipation
  • Phentermine Hydrochloride (HCL), along with a host of non-active ingredients.

Your doctor will decide on your dosage and instructions for taking Phentermine when giving you the prescription. The average dose is 30mg of Phentermine per day, but some patients are prescribed to start off with 15mg per day.


It is recommended that you incorporate diet and exercise into your plan when taking Phentermine. Phentermine is a drug to be taken only on a short-term basis. After six to 12 weeks, you are advised to discontinue taking Phentermine, and continue with your diet and exercise plan to reach your weight loss goals. Phentermine is only intended to help the obese kick start their weight loss plan while they become used to following a low calorie diet and exercise plan.


When you're talking about a prescription weight loss drug, you have a product reserved for people with the most dire of needs. So, obviously this is not for everyone. If you have health problems related to obesity, and you fell you need help in getting some of your weight off, consult your doctor about Phentermine.

Common MisspellingsCommon Misspellings

fentermin, fentermine, phentramine, phenterthin

How Does Phentermine Compare?
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  • User Rating
  • Has Good Appetite Suppressant
  • Has Only Natural Components
  • Contains No Coffee
  • Phentermine
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(Page 7 of 13, 252 total comments)


I have been on phen about a week i dont know if i lost any weight but so far i really like it i feel like i have control of what i eat..and i control my portion sizes and i even feel healther and i have a lot of energy the only downside i am having trouble falling asleep...good luck everyone

posted Nov 7th, 2010 1:56 pm


I have been on Phentermine for a week and I still hungry everyday, and have actually gained 2lbs. What am i doing wrong?

posted Nov 5th, 2010 6:52 pm


I am a 27 weighting in at 254lbs 5�??7. Today I started taking Phentermine. My ideal weight for now is 200lbs by Jan but long term would be around 170. I already drink a lot of water (at least a gallon a day) and excise 3x a week; my down fall is that I do eat whatever I want. I am a diabetic so I don�??t eat a lot of sweets its more of soul food that I love. So I was wondering if there is advice that anyone can give me on what else I need to do.

posted Nov 1st, 2010 1:30 pm



I started Phentermine Oct.8,2010. I lost 13 ponds as of today. sometimes i get hungery, but for the most part it really curbs my hunger. i work diff. hours a my jod so when i work at 7am i take my pill at 10am like the doctor says. when i work later i take my pill a lilttle later. it works for me! so when im up later im not hungry. i like this pill so far :) THE ONLY DOWN SIDE IS THAT I GET DRY MOUTH.

posted Oct 29th, 2010 2:37 pm



I first started phentermine in 2007.. on and off, i lost lots of weight, and didnt keep up with my eating and stopped the pill where i gained all the weight. Last yr 2009 i decided to try it again for 4 months and loss lots of weight, and ive been going to the gym 3-4 times per week, im happy with this drug. my doctor said if while on this med. you feel good then your eating too much... i eat lunch and dinner. and have lots of water daily. i eat on a salad plate and at times i cnt even finish my meal... good luck to all

posted Oct 27th, 2010 5:13 pm


I started mine on sept 18 and lost 9 pounds in the first 10 days. I'm losing slower now but have lost a total of 20 pounds as of today. I take 30 mg once a day. I get a little bit hungry in the afternoon and eat an apple, that seems to be enough to hold me until supper. I have been writing down all food I eat and the calories. I have lowered my caloric intake to around 800-900 a day. I just can't eat that much anymore. I recommend sticking with it and watching what you eat. Good Luck to all!

posted Oct 15th, 2010 10:37 am user comment


HI! I have been on phentermine for 1 week now!! I have been eating ok and have been working out 3-4 times a week! I have not lost even one pound, im kinda bummed! :( I have had friends that have used tne med and have lost 5-7 lbs a week. I am on 15 mg once a day! I was wondering if maybe I need a higher dose for it to work for me? it does help control my hunger, but I'm find my self starving sometimes. Does anyone have any suggestions????? Thank you!

posted Oct 14th, 2010 9:38 pm


i went to a doctor in Miami and he gives his patients a diet plan and other pills along with the appetite suppresant.

posted Oct 10th, 2010 9:53 am


It makes you not hungry with a ton of energy. You will not be able to sleep or eat. Your heart will beat fast. It's exactly like being on speed. You will become tolerance will increase and after awhile it won't work anymore. I suggest taking the smaller dosage at first every other day then increase as time goes by. Don't buy online from different countries it is fake. I can't find a Dr that will prescribe to me. They all say it's really bad for you and I can't afford to go to a diet clinic. The nock offs like Phentramine don't work the same and beware if you order it sometimes they automatically keep sending it to you and charging your credit card. >:( I lost 60lbs in 6 months with it. It motivated me to excersize and not eat.

posted Oct 4th, 2010 6:28 pm


My name is Terria. My doctor prescribed phentermine and I started today. I'm somewhat nevous because today I started off with the full feeling but about after 1:00 I became hungry... not extremely but hungry. I took the phentermine at 8am. Can anyone give me any feedback on their first day on phentermine? Is this normal? What type of diets are you following? Any additional feedback.

posted Oct 1st, 2010 6:54 pm


I am 48 years old today. I had a complete hysterectomy 2 years ago and gained 70 lbs. I have tried every diet and I exercise 3 to 5 times a week. I weighed 200.8 pounds last week when I saw my Dr. and got a perscription for Phentermine. I started it on 9/18 and I don't have much of an appetite anymore(I have to make myself eat) and I have all kinds of energy. I weigh 197 pounds today! That's 3 pounds in 3 days! I love this stuff! I am finally starting to get back on track(I needed a jump-start). I also started to measure all of my food and I write down everything that I put in my mouth and how many calories. I eat less than 1000 calories a day now. Good luck to everyone else!

posted Sep 21st, 2010 2:19 pm user comment


I live in nothern Vermont and I am having trouble finding a doctor that will prescribe me phentermine. I am 18, 5'4", and I weigh 247lbs at the moment. I should think that I qualify to get it considering I've been on two diets and work out fairly regularly but still haven't seen results... If anyone knows of a doctor in Vermont that would would be willing to prescribe phentermine to me please let me know. :) My email is [email protected] it would be greatly appreciated.

posted Sep 16th, 2010 4:15 pm



I am 25 years old with 3 kids ages: 5,2, and 3 months. Before children my weight was between 165-170 and now im 235.6 pounds. I couldnt take it any more!!! So I started phentermine on 9/1/2010 weighing 235.6 and now as of today(which is not even a whole week) 9/6/2010 I weigh 225.3 pounds!!! WOW!!!! I've lost 10 pounds in 5 days! My goal is to lose a total of 50 pounds and I am so happy that this pill has worked for me. I dont crave food at all. Sometimes I forget to eat so I just grab a fruit or a small salad from mcdonald's. :) Its strange to go from a SUPER SIZED BIG MAC COMBO to a small salad and water. But I absolutely love it!!!

posted Sep 6th, 2010 3:37 pm


I am 39 years old. I started phentermine on 2/12/10 and weighed 229 (ht 5'6). Today (9/2/10) I weigh 168. A total of 61 pounds lost. I also belong to OA (overeaters anonymous) and have expressed to others how much this pill has saved my life. I am a new person now and love life. I no longer live for food, I live to live. I have read all the good and bad about this drug. This drug has been out since 1959. Honestly, if it was all the bad that is being said, why is it still around 61 years later.

posted Sep 2nd, 2010 5:52 pm



I started taking phentermine two-three months ago and i have lost 20lbs. i think it works, and i've also gained muscle due to my consistency in strenght training. the only downside is that my doctors have hesitated me to take it every time i'm ready for a refill in my prescription. it makes me upset because i work out and eat healthy on a daily basis. its changed my life and i'm still in need of losing weight. i'm at 170 lbs now when i started i was almost 190lbs which is very scary. i hope that doctors begin to understand that most patients do not want to stay on phentermine but need it to reach their goal and implement a healthy diet lifestyle.

posted Aug 16th, 2010 2:54 pm


I am 19 years old mother of one, 5'2 and started phetermine at 164 lbs. 18 months after having my son. I've only been on it for exectly one week now. I have never eaten breakfast but started eating lean cuisiens* for lunch and dinner. Nothing else besides that, ad drinking only water, and fast walk .5 miles a day and do an 8 min abs tape. In this week I have lost 4 lbs, 1.1% body fat, and gained .8% water(due to how much water I drink). But over all I am very happy. In lbs I haven't lost alot, but I can now fit very comfortably in a pair of pants I could barely button at the start of this week. =) I can tell I gained muscle weight too, anther reason why I didn't loose so much acording to the scale.

posted Aug 15th, 2010 6:11 pm


I am 22 5'2 right now I am 176 been on the pill for a week and 2 day lost 8 lbs in the 1st week, I work out 5 days a week, plus I am a pharmacy tech so I stay active all day long. my short term goal is 150. long term goal 130 by 8-2011

posted Aug 15th, 2010 12:42 pm


I am 21, 5'4 and am 130 lbs:( is this drug right for me?

posted Aug 7th, 2010 2:18 pm


my name is erika and today is my third day on phentwermine and ive already lost 5 pounds without excersise but i do eat healthy i was kinda nervous in the beginning but im doing whats best for me i started off weighing 192.4 pounds and now i weigh 187 and thats in three days at this rate i would be at my goal at the end of the month and thats to weigh 145 pounds good luck

posted Aug 5th, 2010 1:46 pm


I love Phentermine! I am only on day 3 and I have already lost 8lbs!!!!! And that's without exercise!!!! For the first time in my adulthood, I am not constantly obsessed with food.

I am able to do important things and fun things because instead of binging several times a day, my appetite in practically non existent.

Starting today, I plan to incorporate exercise into my routine. Light walking some days and aerobic/weight training classes on other days. Altogether, I plan to workout 5 times a week.

I'm 23, 5'3, and I weigh 192. I would like to get down to 120 at this rate, I'll be there by October!

posted Aug 2nd, 2010 2:57 pm


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